Preparation and Characterization of Titanate Nanomaterials-Supported Mn Catalyst the Evaluation Photocatalytic Degradation and Human Cell Inflammatory Effect

• Main Authors: I-Hua Shen, 沈一樺
• Other Authors: Chao-Chin Hu
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/71088194469193814162

碩士 === 中山醫學大學 === 應用化學系碩士班 === 101 === In this study,multi-walled sodium titanate nanotubes(Na2Ti3O7,abbreviated as NaTNTs) were prepared by hydrothermal treating Titanium Dioxide anatase powder in 10M NaOH at 110℃ for 4 days. First Na ion was changed NH4 ion in ion exchange, after Mn-doped TiO2nanotubes was prepared to form ion exchange in different MnNO3 aqueous concentration, MnTNTs was calcined at different temperature.The morphology and crystalline structures of the samples were characterized by SEM and XRD. Specific surface area and pore volume of the MnTNTs were characterized by BET. Element analysis of the MnTNTs was characterized by neutron activation analysis. Visible region and UV region absorption was used DRS. Photocatalytic degradation of methylene blue (MB) experiments was utilized 400W high pressure Mercury lamp. Identification of Visible and UV absorption,MB degradation activity followed the order 800℃>600℃>700℃>500℃>400℃>110℃. Nanoparticle’s surface and small-dimension effects will cause physical or chemical changes of the material. Initialnanotubes were converted to anatase nanowires after the calcination at 400℃. The calcination at higher temperatures led to gradual decomposition of the wires to rods.Moreover, beside the toxicity of the nanoparticles related to above description,inflammation associated cytokines were evaluatedon THP-1 human monocytes cell line in this study. Different titanate nanoparticals with or withoutLPS-induced cytokines excretion from THP-1cell were compared, to elucidate the material characteristics related effect on inflammation.